[THIN] Re: Swap file recommendations
- From: "Jeremy Saunders" <Jeremy.Saunders@xxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Mon, 1 Mar 2010 20:48:37 +1100
Hi Angela,
Yeah....way too big. You will often find that even with a 4GB pages
file, it's usage is only 30 - 40%, so why create larger ones? Run up
Perf Mon and check the pagefile usage under load. Personally, I start
with a 4GB pagefile, and cut back from there.
None of your "client" apps will be PAE aware...not even the MS Office
Suite. Like I said the extra addressable memory will only be used by the
system as virtual memory.
Cheers,
Jeremy.
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Angela Smith
Sent: Monday, 1 March 2010 3:59 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
Hi
I have PAE enabled and we have no issues with the Applications working
in this mode. I have set the "write debugging information" option to
kernel memory dump. I have set the pagefile to 10GB but am concerned
its too big or may have a performance impact. Is there any issues with
leaving the swap at 10GB? Is performance impacted as the file is
bigger?
Regards
Angela
________________________________
From: stefan.timmermans@xxxxxxxxx
To: angela_smith9@xxxxxxxxxxx
Subject: RE: [THIN] Re: Swap file recommendations
Date: Sun, 28 Feb 2010 20:45:06 +0100
Angela,
The PAE switch is ok, if the apps (or at least some ) are PAE aware
(kind of > 32bit but less then a real 64 bit environment), so this might
be limitted to MS apps addressing above the 4GB barrier (maybe Oracle ?
anyone an idea on that ? or does Oracle have its own memory manager as
some SAP products do ??)
Paging beyond 4096MB requires several volumes as there is an limit
imposed per volume of 4096MB (but there is a backdoor to create separate
folders for every pagefile)
http://support.microsoft.com/kb/237740
Regards,
Stefan
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Jeremy Saunders
Sent: zondag 28 februari 2010 17:42
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
That's not 100% correct Nick. Using Enterprise Edition you can enable
/PAE in the boot.ini so that the "System" will see all the RAM. No apps
will be able to address the memory above 4GB, but the System will use it
as virtual memory. There have been many studies done that say that this
will provide a considerable performance boost. I would still start with
a 4GB page file, but you may be able to decrease this or remove it
altogether. However, if you still want to enable kernel memory dumps,
leave an 850MB page file on the System drive. You would never do a full
memory dump!
Cheers,
Jeremy.
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Nick Smith
Sent: Sunday, 28 February 2010 8:32 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
The x86 OS will only see 3gb Ram in any case so you don't need to worry
too much.
On 28 Feb 2010, at 04:07, "Angela Smith" <angela_smith9@xxxxxxxxxxx>
wrote:
Hi
Im building new Windows 2003 Enterprise servers with XenApp 4.5
(32 bit). Servers have 16Gb RAM. Hardware was originally sized for x64
but we must go with x86. How big should the swap file be if server has
16Gb RAM? If I follow the RAM X 1.5 rule I will end up with a 24GB swap
which seems like overkill. I have the disk space but was wondering what
the best practice is or if there are dissadvantages in using a large
swapfile.
Thanks
Angela
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